No. He should not. The DoJ and Intel community has been lying about this through their teeth all along. The whole Mueller witch hunt is a typical deep state false narrative crisis. There is no evidence the DNC was ever hacked by anybody. The FBI never examined the servers in question. Crowdstrike has very weak credibility especially about Russia. They have been wrong about Russian hacking before. There is zero actionable evidence that anybody ever hacked the DNC. Nobody will ever be convicted of hacking the DNC and everybody, including the tyrannical thug Mueller, knows that is a fact. President Trump should go with his best guess and ignore the long time DC denizens.
They keep talking about all these crimes that they claim occurred, but have yet to present any evidence.